It Was Temporarily Turned Into a Fascist Retreat

In its operation over nearly three centuries, the Halcyon has been through several owners—the Hutt Cartels purchased it during the Clone Wars, for example, presumably because the interstellar cruise industry just wasn’t having a particularly great time clashing with the interstellar conflict industry’s busy calendar. But the reason no one was sunning around aboard the Galactic Starcruiser during the age of the Empire?
The Empire took it and turned it into a officer’s retreat, a combination of lawless pirates skulking about its lower decks while Imperial bigwigs wined and dined and hoarded treasures across the galaxy above.